Highway-lighting unix



Aug. 25, 1925. 1,551,274

J. R. TOWNSEND HIGHWAY LIGHTING UNI T Filed June 16. 1922 3 INSULATION WITNESSES: i:::: INVENTOR iii-35 (Tm/7f? 7iw/7smd ATTbRNEY specification.

Patented Aug-. 25, 1925..

., UNITED s'rATEs PATl-INTOFFICE.

JOHN R. 'rownsnnn, or souriirnmi; INDIANA, Assrenon TO enon'en ctfTTER cou-..

' ran, A conronnrxon or INDIANA,

nrqnwar-menrine nun.

Appllcatign filed Iune'18,

' To all whom it may concern:

Be it known that I, JOHN R. TowNsnNn, a citizen 'of the United States, anda resident of South Bend, in the county of St.

,Joseph and State of Indiana, have invented a new and useful Improvement in Highways Lighting Units, of which the following 1s a My. invention relates to lighting units, more especially to devlces for street and highway lighting.

Itis among the objects of thisinvention to provide' a streetrlighting unit of improved construction which shall be of greater utility and shall have increased efliciency over devices of this character heretofore employed.

It is a further object of. this invention to provide a device of this general character V with the standard silver-plated reflector.

My present invention is directed to a l1ghting unit having an. improved reflectori-sys which shall be of simple, compact structure,

which shall be readily accessible and which shall be adapted to be mounted in position by a simple and inexpensive support.

v Street-lighting units embodying silverplated reflectors heretofore employed have had the reflectors thereof more or. less exposed to the weather, which resulted in corrosion and tarnishing thereof and loss of efliciency in reflecting light. Reflectors made of porcelain-enameled steel which are weatherproof, are ineflicient, as compared tem which is protected from the weather'in characters designate like parts,

in section, of the lamp structure.

that the reflector is' completely protected.

from the atmosphere, and the general shape and design. of the reflector system is such as to provide an efll'cient and durable-light-j Referring to Fig. 1, the lamp unit is susin unit.

n the accompanying drawing, constitut-. ing a part hereof and in which like reference Figure 1 isa view of a street-lighting unit embodying the principles of my invention,- which illustrates the effective of the light beams; and;

Fig. 2 is a side elevational view, partially Referring to Fig. 2, the lighting unit consists of a metal base 1, having a threaded opening 2, by which it is secured to a mount-.

, ing bracket. An insulatin spacing member 3, having an annular ange 4 adapted to fit into the'base 1,is securedthereto by a plurality of screws 5 seatlng in a corredrill 19 having distribution 1922. Serial a 568,716.

sponding-plurality of recesses 6 in the flange 4. The insulator 3 is provided with two openings 7 to take the lead wires in to the socket .in thelamp chamber and is further provided with a 1 plurality of countersunk holes 8, adapted to receive a plurality of cap screws. 9 to, secure a tubular housing -10. A porcelain lamp socket 11, adapted to receive an incandescent. lamp 12,. issecured to the insulator 3 in a; suitable manner and is providedwith a pair of terminals (not A combined reflectori'and hood 13, of a substantially parabolic shape, is secured to shown) by'which the lamp is connected in an electrical circuit.

the tubular housing '10 by a plurality of screws 14 seating in the annular groove 15 .of a sleeve .16, constituting an integral part of the reflect-or 13, which hasan annular flange 17 on the lower edge thereof. The lower portion of the reflector system comprises a pair ofrefracting surfaces 18 in angular relation to one another. The refractors each consist of apair of glass plates 7 prismatic refracting surfaces in co-operatlve relation to each other. refractors are mounted in a metal frame 20, which is hinged at the joint 21 to allow access to the inner chamber for removal of the lamp I2. D '7 The reflector 13' surface. 22, from'which the light beams 23,

emitted from the lamp 12, are reflected verhas a silver-plated inner These ticallydownward, as-indicated by arrows 24,

upon the prismatic refractors 18, which bend them in a direction inclined to the horizontal and in opposite directions, as indi-.

cated by arrows 25.

pended from a suitable post 26, by means of a pipe bracket 27, which is fastened to desired angle of approximately 10 degrees to the horizontal along the highway. This will permit spacing of the lighting units far 'ther apart, which is a desirable feature in highway lighting. Another advantage isthat the light is entirely enclosed by the com ination reflector hood which consti tutes a chamber, thereby protecting it may be modified and the means for mounting may be changedto suit specific require ments. The lamp socket may be formed integral with the insulating spacing member.

I claim as my invention: 1. A street-lighting device comprising a base provided with a lamp socket adapted to receive a lamp, a tubular housing secured to said base and extending vertically therefrom, a combination reflector 'hood having a" reflecting surface adapted to reflect light beams vertically downward and a plurality of units containing refracting surfaces adapted to bend said reflectad beams at an angle of approximately 10 degees to the horizontal in opposite direoticus.

2. A street-lighting device (omprising a base provided with a lamp snnket adapted to receive a lamp, a tubular housin secured to said base and extending vertica y therefrom, a combination reflector hood secured to said housing, said reflector hood consisting of a parabolic membef having a reflecting surface adapted to reflect the light beams Vertically downward and a pair of angularly disposed refractors consisting of a plurality of glass plates having prismatic refracting surfaces 1n co-operative relation,

adapted to bend said reflected beams.

3. A street-lighting device comprising a base provided with a lamp socket adapted to receive a lamp, a tubular housing secured to said base and extending vertically therefrom and a combination reflector hood secured to said tubular housing, said reflector hood consisting of a parabolic member having a reflecting surface adapted to reflect light beams vertically downward and; a plurality of angularly disposed units containing plates having prismatic refracting surfaces in cooperative relation adapted to bend said reflected beams in opposite directions.

In testimony whereof, I have hereunto subscribed my name this 7th day of June, 1922.

J. R. TOWNSEND. 

